Drier



Feb. 16 1926., 1,573,453

R. .3. RITCHIE DRIER Filed May 18, 1923 2 Sheets-Sheet 1 INVENTOR b I? 5/; Imam/a R. J. RITCHIE DRIER Feb. 16 1926. 1,573,453

Filed May 18 1923 2 Sheets-Sheet 2 x m\ in *0 w 2 w N/NVENTOR By R02 J/mma ATTORNEY I:

provided to permit the air in the drier chamber to absorb the effective heat unit-sof the products of'combustion before they pass out through the ducts l6 and 17. Since the depending portions 19 and 20 bridge the space between the top of the drier chamber and the top 5, the products of combustion will be retarded in their flow at these points so that the top of the chamber may also be heated. the purpose being to provide a uniform heat throughout the entire heating chamber and to permit the incoming fresh air which passes through the openings 4-1. and iii-2 to absorb as much heat as is practicable and thereby maintain a high eiiiciency.

The shape of the central recess 36 including the recessed portions 37 and 88 tends to direct the products of combustion toward the opposite side walls'of the drier chamber so that there will be a relatively wide radiating surface over which the fresh air may pass. This will prevent localizing the heat and tend to spread the hot air over the entire bottom of the drier so that uniform heat throughout the drier chamber 4-3 will be provided. By providing the constricted opening 27, only enough air passes into the space above the bottom 6 to support combustion; therefore, the tendency of the prodnets of combustion to flow rapidly will be,

reduced to a minimum.

In actual practice I have found that a device constructed in accordance with my invention provides a high degree of efficiency and since the products of combustion do not come into contact with the contents of the drier chamber and the articles treated in the drier chamber will not be subjected to the obnoxious fumes of the products of combustion. On the contrary, the fresh air passing in and about the articles to be treated will evaporate the moisture while leaving the products sweet and clean. This is an important feature in devices of this class.

I have'specifically defined the best con struction known to me for carrying out my invention but I do not wish to be limited to'the exact details of construction shown as obviously, changes in form, proportion and minor details of construction may be re sorted to without departing from the spirit ofthe invention or sacrificing any of its advantages.

iVhat I claim and desire to secure by Letters-Patent is: i

1. In a drier, a casing having a constricted opening in its bottom to admit air to support combustion, a heater above the opening, and a drier chamber above the heater having a bottom provided with a trap chamber extending from the front to the back of the casing and having a constricted inlet in line with the burner.

2. In a drier, a casing having a constricted opening in its bottom to admit air to support combustion a heater above the opening, and a drier chamber above the heater having a bottom provided with a trap chamber having a constricted inlet in line with the burner, the drying chamber having dia1nctrically opposite air inlets comnmnicating with atmosphere near the bottom and an outlet at the top.

In a drier, a casing having a constricted air inlet in its bottom, a drying chamber within the casing having vertical walls and horizontal walls spaced from the casing, a heater between the lower horizontal wall of the drying chamber and the air inlet, and outlet pipes in the top of the casing having their lower ends extending below the top of the casing. Y

1-. In a drier, a casing having a constricted opening in its bottom'to admit air to support combustion, a drier chamber above the bottom and Within the casing, the bottom of the drier chamber being formed to provide a horizontal 1 eat trap with a constrict ed inlet intermediate its ends in line with the opening in the bottom of the casing, and a burner between the inlet and the opening. 5. In at drier, a casing, a drier chamber within the casing spaced therefrom to provide side passageways, the bottom of the drier chamber comprising a sheet having portions bent downwardly and inwardly and then outwardly and upwardly to the side walls of the chamber to provide a heat trap with a. constricted inlet opening, a bottom wall below the heat trap to provide a heat chamber with which the trap communicates, the heat chamber communicating with with the side passageways.

.6. In a drier, a casing, a heat chamber spaced within the casing having an open top communicating with the top of the casing, outlet pipes in the top of the casing having depending portions extending into the casing substantially a distance equal to the space formed by the top of thedrier chamber and the casing and means for applying heat to the bottom of the drier chamber.

In testimony whereof I affix my signature.

RUSI-IJ. nrrcnm. 

